Drink noisily, not quietly? That brings disparaging comment (4)
I believe the answer is:
slur
'disparaging comment' is the definition.
(I've seen this before)
'drink noisily not quietly?' is the wordplay.
'drink noisily' becomes 'slurp' (I've seen this before).
'not' is a deletion indicator.
'quietly?' becomes 'p' (p for piano and quiet).
'slurp' with 'p' taken out is 'SLUR'.
'that brings' acts as a link.
(Other definitions for slur that I've seen before include "Speak indistinctly, as a drunk might" , "Slight; blur" , "Pronounce indistinctly - discredit" , "Pronounce indistinctly or speak ill of" , "Disparaging comment" .)